Machine for sharpening gin-saws



(No Model.) Y y P. GATHRIGHT A. W. POTTS.

y MACHINE OR SHARPBNING GIN SAWS. No. 259,125. Patented June, 1882.

w22/Ww 2 V' f flf M l WITNESSES- %f/I TOR... 1 WMTTORNBYS.

l UNITED STAT-Es PATENT OFFICE.

ALBERT P. GATHRIGH'I AND ANTHONY W. POITS, OF COOPER, GEORGIA.

MACHINE FOR SHARPENING GIN-SAWS.

SPECIFICATION forming part of Letters Patent No. 259,125, dated June 6, 1882. Application filed March 3, 1882. (No model.)

To all whom it may concern Be it known that we, A. l?. GATHRIGHT and A. W. POTTS, of Cooper, in the county of Jackson and State of Georgia, have invented certain new and useful Improvements in chines for Sharpening Gin-Saws; and we do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others 'skilled in the art to which it appertains to make and use the same, reference being had to theaccompanyin g drawings, which form a part of this specication.

Figure l is a perspective view, Fig. 2 is a 4 side view, and Fig. 3 is a longitudinalvertical sectional view, of our improved gin-saw-sharpening machine.

Gorresponding parts in the several gures are denoted by like letters of reference.

This invention relates to machines for sharpening gin-saws; and it consists in certain improvements in the construction of the same, which will be hereinafter fully described, and particularly pointed out in the claims.

In the drawings hereto annexed, A represents the frame of the machine, which is provided near its rear end with bearings for the transverse main shaft B. The latter has a' gear-wheel, C, engaging arpinion, G', upon the rear end of the longitudinal drivin g-shaft D, to which motion may thus be imparted.

lE is a rock-shaft mounted transversely in the frame A, and carrying a rearward-extending lever, F, which is operated by a cam, G, upon the main shaft B. Rock-shaft E also has an opening or slot, H, in which a lever, I, is vertically adjustable by a set-screw, J. The lever I bears againstand operates an arm, K,

'projecting downwardly from a rock-shaft, L,

mounted in frame A in front of and above the rock-shaft E. Arm K carries a forward-extending pawl, M, which projects slightly in front of the machine, so as to engage the teeth of the saw, which has been suitably mounted for sharpening, and turn the said saw forward the space of one tooth at each stroke or operation. The stroke may be regulated to suit saws with teeth of various sizes by properly adjusting the lever I.

Mounted in suitable bearings upon the top of frame Ais alongitudinally-sliding shaft, N, having near its front end a crosshead, O.

P is a vertical shaft, journaled in said crosshead and carrying at itslower end a pinion, Q, engaging and operated by a Worm, R, upon the front end of ithe driving-shaft D. At its upper yend the shaft? carries a gear-wheel, S,

engaging a pinion, T, upon the upper end of a short vertical shaft, U, which is mounted in the front end of slide N, and which carries at its lower end the circular file W. The slide N is operated by an arm, V, extending upward from the rock-shaft L and engaging a stud, X, upon the under side of said slide. A spring, Y,vis suitably arranged to force the said slide automatically in a forward direction.

The machine may be operated by hand by means of a crank, Z, upon one end of the main` shaft B, or by any suitable motive power applied in any well-known manner.

In operation the saw' which is to be sharpened is to be suitably mounted in front ofthe machine, facing the file. When the main shaft is revolved the cam G strikes and operates the lever F, thus oscillating the rock-shaft E, the lever I of which operates arm K and pawl M, which latter advances the saw the space of one tooth. By the same operation the arm V of rock-shaft L forces the slide N, with its attachments, in a rearward direction, thus moving the le back from the saw. The moment the lever F is released from the pressure of cam G the slideNadvances, and the tile, which is rotated by the driving-shaftD and intermediate mechanism, operates' upon the saw. While the slide Nis moved rearward thepinion Q of the shaft l? would be revolved in a reverse direction by its teeth engaging' the spirals of the worm R, provided the latter remained stationary while the rearward movement of slide 'of the United States- 1. The combination, in a machine for sharpening ginsaws, of the main shaft B, having cam G, rockshaft E, having lever Fv and vertically-adjustable arm I, and the rock-shaft L,

Iofe

having arm K, provided with a forward-exl W, and the spring Y, all arranged and operattending pawl, M, substantially as set forth. ing substantially as set forth.

2. As an improvementin machines for sharp- In testimony that we claim the foregoing as ening gin-saws, the combination of the main onr own we have hereto affixed our signatures 5 shaft B, having cani G, rock-shaft E, having in presence of two Witnesses.

lever F and vertically-adjustable arm I, roek- ALBERT P. GATHRIGHT. shaft L, having arm K, provided with pawl M ANTHONY W. POTTS. and arm V, the driving-shaft D, having pinion Witnesses: C and Worm R, thel slide N, having stud X, S. M. HERRINGTON,

1o. shafts P U, gear-whee1 S, pinions TQ, and 61e JOHN J. HUGGINS. 

